Effects of Heat Treatment on Microstructure and Corrosion Behavior of SiCp/Al-6wt%Mg Composites. Issue 12 (December 2016)

• Record Type: Journal Article
• Authors: Xia, Cui; Xianliang, Zhou; Delai, Ouyang; Tongcai, Chen
• Is Part Of: Xi you jin shu cai liao yu gong cheng. Volume 45:Issue 12(2016)
• Page Start: 3085
• Page End: 3088
• Publication Date: 2016-12
• Subjects: heat treatment -- SiCp/Al-6wt%Mg composite -- precipitates -- corrosion; Nonferrous metals -- Periodicals; 669.05
• DOI: 10.1016/S1875-5372(17)30058-9
• Languages: English
• ISSNs: 1875-5372

Abstract

Abstract: The present work investigated the influence of heat treatment (T1, T4, T6 and annealing) on the microstructure related to the interfacial reaction and corrosion behavior of SiCp /Al-6wt%Mg composites prepared by a pressureless infiltration technique. The results show the occurrence of the precipitates of Si, MgA12 O4 and Mg2 Si as a result of the interfacial reaction between the SiC particle and the matrix of the composites during heat treatment. The precipitates contents ( f ) of the composites correlate with T1, T4, T6 and annealing heat treatment, following the order of f T1 < f T4 < f T6 < f annealing . The precipitates near SiC particles are responsible to pitting corrosion as a degradation mechanism of the composites. The heat treatments carried out on the composites present a significant influence on the corrosion rate ( j corr ). The correlation between j corr and heat treatment shows the characteristic of j corr-ann > j corr-T6 > j corr-T4 > j corr-T1, which may be attributed to the interfacial reaction precipitates of the composites during heat treatment.